overboosting problem 1.8t agu

[GeoA3]

my car is chipped and should boost 1.4bar,for a while it boosting 1.6
i disconnect the two electricity wires that connected to the n75 valve and went to test drive
now instead of boosting 0.5 bar the car still boost 1.6bar!!!
any ideas?

 

[Lewis583]

Check all vac pipes on the same line as the wastegate actuator

 

[Prawn]

sounds like the pipe from the actuator to wastegate has come off somewhere, or possible from charge pipe to N75 and causing a boost leak as well.

that's the only explaination if you're getting above actuator pressure with the n75 disconnected

 

[s3dave]

Actuator damaged /semi siezed...... wastegate siezed/partially siezed .........bent actuator rod....

 

[GeoA3]

how to check the actuator?

 

[GeoA3]

ok i just checked the hose from actuator to the n75 and was cracked , the rubber was hard like a rock !
lucky i have a tons of silicone hoses from ebay, everything works great now .